Patents by Inventor Toshiharu Ogasawara

Toshiharu Ogasawara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mechanical filter
    Patent number: 4633204
    Abstract: A mechanical filter having as its major part at least one longitudinal vibration mode vibrator, includes a piezoelectric ceramic plate an electrode pair attached to top and bottom surfaces thereof. The piezoelectric ceramic plate is polarized in its thickness direction to form at least two polarized regions, the polarization directions being different from each other.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: December 30, 1986
    Assignee: Fujitsu Limited
    Inventors: Takashi Gounji, Shinichi Yamamoto, Teruo Kawatsu, Yoshiro Tomikawa, Masashi Konno, Toshiharu Ogasawara